Pile wire inserting means for looms



Nov. 20, 1934. R, UT E' 1,981,478

FILE WIRE INSERTING MEANS FOR LOOMS Filed March 1, 1934 2 Shets-Sheet 1IllllllllllllllllllllllllllllllllIlllllllllll INVENTUR ATTORNEY 1934- R.SUTCLIFFE FILE WIRE INSERTING MEANS FOR LOOMS- Filed March 1, 1934 w wwJara lFFE =VZWO/m ATTORNEY Patented Nov. 20, 1934 UNITED STATES PILEWIRE INSERTING MEANS FOR LOOMS Raymond Sutcliffe, Cornwall, N. Y.,assignor to Firth Carpet Company, Firthcliffe, N. Y., a corporation ofNew York Application March 1,

Claims.

This invention relates to pile wire inserting means for looms and hasfor its object to provide a simple and eflicient apparatus by which thepile wires, over which the warp pile loops are formed,

5 can be inserted with accuracy and extreme rapidity.

Heretofore, in looms of this character, the pile wires have beeninserted and withdrawn by means of a complex and intricate mechanismwhich not only added greatly to the manufacturing cost of the loom butdid not operate with a maximum of efliciency as far as inserting theWires in the shed with the greatest possible speed was concerned. Myinvention therefore, contemplates a relatively simple mechanism whichwill insert the pile wires in the shed with accuracy and speed andwhich, through an arrangementof relatively few parts will materiallyincrease the speed'of wire insertion.

In the accompanying drawings, wherein an embodiment of the invention isshown, Fig. 1 is a plan View of the pile wire inserting mechanism; Fig.2 is a sectional view on the line 22 of Fig. 4, looking in the directionof the arrows; Fig. 3 is a sectional view on the line 3--3 of Fig. 4,looking in the direction of the arrows; Fig. 4 is a plan view of aportion of the wire-inserting mechanism; Fig. 5 is a side elevation ofthe mechanism shown in Fig. 4, with some of the parts in section; Fig. 6is a sectional View on the line 66 of Fig. 4, looking in the directionof the arrows; and Fig. 7 is a diagrammatic view showing the course ofthe chain which returns the wire-inserting carriage.

In the drawings, 10 indicates the woven fabric, which may be carpetingor other fabric in which a warp pile is produced. The shedis indicatedat 14 and the Warp pile picks at 12. At 13 is shown a number of pilewires which have been successively inserted in the shed. One of the pilewires 13 is shown in detail in Fig. 2, where it will be seen that thesame consists of an elongated flat strip, nearly rectangular in crosssection. On its upper edge adjacent its pointed end it is formed with asharpened blade 11 which on the longitudinal withdrawal of the wire fromunder the pile loops, acts to sever these loops. The structure thus fardescribed is common in loom construction.

At 15 is shown a carriage which, on its return movement to the right ofFig. 1, engages the inserted wire 13a and withdraws it out of thefabric, and then on its movement to the left in that figure, under thepropulsion of a spring-pressed plunger inserts the wire in the shed. Thecar- 1934, Serial No. 713,466

riage has a flat or horizontal plate portion 16 provided with a verticalflange 17. Secured to the outer face of the vertical flange 17 by screws18 is a plate 19 (Fig. 5) having a laterally extending top flange 22 anda downwardly extending lug portion 20 carrying a projecting stud 21.

The carriage is moved to and from the fabric with a reciprocatingmovement on a frame mem-' ber 30 which is provided with a longitudinalguide groove 31 in which complementary shaped blocks 32, secured to theunder side of the plate 16 of the carriage, are guided (see Fig. 3).These guide blocks 32 are attached to the plate 16 by means of the bolts36 which also secure a plate 37 to the upper face of the plate 16. Plate37 is provided with a vertical flange 38. Pivoted at, 24 in the bosses25 and 26, provided on the flanges 1'7 and 38' respectively, is a pawl23 which is normally dependent through an opening 39 in the plate 16 sothat its lower hooked end 40 (Fig. 6) is located in position to. form anabutment for the hookshaped member 41 carried by a chain 42. The chain42 has its upper stretch movable through the lower portion of the guidegroove 31 so that at the proper time the hook 41 will engage the end 40of the pawl 23 and ,by pressure thereagainst will force the carriage tothe right of Figs. 1 and 4 to cause it to withdraw one of the wires from'the fabric, and particularly the then'innermost wire, indicated at 13a.

The pawl 23 is normally held in its operative position, as shown in Fig.6, to act as an abutment for the hook '4l'by means of a dog 43 which ispivoted at 44 in-the bosses 45 and 46 (Fig.4) formed onv the flanges 17and 38 respectively. The lower end of the dog 43 is'held in engagementwith a notch 47 formed in the pawl 23, by means of'a spring 48 havingone, of its ends at tached to a pin 49 projecting from the side of thedog and its other endattached to a pin 50 projecting from the plate 37.

At v51 is shown a cylinder. provided with a pair of downwardly extendinglugs 52 which are se cured by means of the screws 53, to the framemember'30. The cylinder 51 acts as a housing for a helical spring 54which surrounds a'plunger rod 55 that has an end 64 projecting'out ofone end of the cylinder 51 as clearly shown in Figs. 4 and 5. A plug 56closes the opposite end of the cylinder, said plug being held inposition in the end ofthe cylinder by means of the screws 5'7. Held onthe rod 55 is a cylindrical rubber bumper 58 backed by a washer 59 andnuts 60. Extending upwardly from the frame member 30 adjacent thecylinder is an arm 61 which carries a laterally extending stud 62 onwhich a roller 63 is mounted.

Through the mechanism described, the carriage 15 is, under the action ofthe chain 42, moved away from the fabric or to the right, as viewed inFigs. 1, 4 and 5. As the carriage, under the push of the chain, is somoved, the stud 21 on the carriage will contact with the projecting end64 of the plunger rod and force said rod to the right, the disc fixed onsaid rod within the cylinder acting to compress the spring 54. Thiscompression of the spring continues until the upwardly projecting end 66(Fig. 5) of the dog 43 comes into contact withthe roller 63. The contactof the roller 63 with the projecting'end .66 of the dog 43 will act todisengage the lower end of the dog 43 from the notch 47 in the pawl 23.This will permit the pawl 23 to rise and thus become disengaged from thehook member 41 on the chain. The pawl 23 is caused to rise byreason ofthe fact that its own weight is not sufiicient to overcome the forceexerted by the spring 54, tending to drive the carriage 14 to the left.of Fig. .6. This force exerted in one direction and the movement of the.chain 42 in an opposite direction, act to swing the pawl 23 upwardlyabout its pivot 24 so that an instant disengagement of the carriage 15from the chain 42 occurs at the moment that the dog 43 is tripped. Assoon as the pawl '23 becomes so disengaged from the hook member 41, thecompression of the spring 54 ceases and the spring at once acts on theplunger 55 to cause it to project the carriage 1'5 rapidly to the leftof Fig. 1. At this time, the plate '16 of the carriage is in contactwith a. head 77 on the end of a pile wire and as the carriage speedsrapidly to the left of Fig. 1, it will vigorously thrust the pile wirein the shed. The pile wire, when not in the fabric, is supported in achannel-shaped guide 67, which is pivoted at one of its ends at 68 in alug 69 projecting from the frame member 30.

Near its other end, the guide 6'7 is slidingly supported on'a lug 70also projecting laterally from the frame member 30. A link 71 connectsthe guide 67 to suitable cam mechanism which, at

'1 the proper time, moves the guide 6'7 about its pivot 68 to or fromthe frame member 31 as required.

The means on the carriage 15 for engaging a pile wire consists of a hook'72 which is pivoted at 73 on the plate portion 16 of the carriage and Iis spring pressed by means of a spring 74, said spring acting to holdthe inner end of the hook '72 against a post '75. The hook 72 isarranged to be brought at the proper time into engagement with anaperture 76in a plate or head 7'7 secured at the end of each pile wire13 for the purpose of drawing the pile wire out of the fabric and movingit into position for insertion into the shed.

' Briefly, the operation of the device is as follows: When the carriageis at the extreme left in Fig. l, the guide 6'7 is located adjacent tothe frame member 30, and the hook 72 on the carriage enters intoengagement with the aperture '76 in the pile Wire 1341. The drive chain42 which is an endless chain, driven from a shaft 80 and extending overthesprockets 8'1, 82, 83 and 84, brings this hook member 41 then intoengagement with the end 40 of the pawl 23. At this time, the dog 43 hasits lower end engaged with the notch 4'7 0! the pawl and holds the pawlin the position shown in Fig. 3, so that the pawl acts as an abutmentfor the hook member 41 and as the chain proceeds in the direction of thearrow in Fig. 'Lit moves the carriage away fromthe fabric and toward theright of Figs. 1 and 4. The hook 72,

being engaged with the wire 13a, withdraws said wire out of the fabricand moves it along on the guide 67 which is then in the proper positionto receive and support this withdrawn wire. As movement of the carriageto the right of Fig. 1 continues, the stud 21 comes into contact withthe end 64 of the plunger 55 :and by pressure of the disc 65 on theplunger, the spring 54 is compressed. This action forces the oppositeend of the plunger out of the cylinder, as clearly .shown in Fig. 1where the spring hasbeen fully compressed.

Compression of the spring 54 continues until the upper end 66 of the dog43 strikes the roller :63 which disengages the dog from the pawl 23 andfrees the carriage 15 from its engagement with the chain 42. The plunger55 immediately shoots the carriage to the left of Fig. 1. Just beforethis propulsion of the carriage to the left begins, the guide 6'7 ismoved to the position shown in 1 by the pull on the link '71 and by thismovement has caused the hook 72 to be-- come disengaged from theaperture '76 in the plate 7'7 on the wire 13. As clearly seen in Fig. 2,

an edge of the plate 16 projects into a slot '90 in the plate '77 sothat when the carriage 14 is speedily moved to the left, it propels thewire 13 along on the guide 67 in that direction and into the shed of thefabric. A rubber bumper shown at 86 in Fig. 1 absorbs the shock of thecarriage when it reaches the limit of its movement to the left ofFig. 1. The rubber disc 58 on the plunger rod 55 also absorbs the shockof the end of the rod striking against the plug 56. Any suitable buffermeans commonly used in looms of this type, may be employed for stoppingthe pile wires .at the opposite side of the shed.

From the foregoing, it willbe apparent that the relatively simplestructure disclosed will act to speedily and accurately withdraw andinsert pile wires without in any way slowing up or impeding the normal,relatively high speed operation of the loom. With the mechanismdescribed, I dispense with a large number of gears,

cams and other complex arrangements of parts heretofore used in devicesof this character, which not only greatly increased the cost thereof,but tended to impede the high speed operation of the loom.

What I claim is: 1. .In a loom, a carriage movable to and from thefabric for withdrawing a pile wire therefrom and then inserting it inthe fabric shed, means for engaging the carriage and moving it away fromthe shed on its withdrawal movement, a plunger, a spring for forcingsaid plunger in one direction, means on the carriage for compressing thespring while the carriage is moving away from the shed, and means fordisengaging the carriage from the carriage-moving means after the springhas been compressed by the carriage. 2. In a loom, a carriage movable toand from the fabric for withdrawing a pile wire therefrom and theninserting it in. the shed, a driving chain having means for engaging thecarriage and moving it away from the shed on its withdrawal movement, aplunger, a spring for forcing said plunger in one direction, means onthe carriage for abutting against the plunger to compress the springwhile the carriage is movingaway from the shed, and means fordisengaging the carriage from the drive chain after the spring has beencompressed by the carriage.

3. In a loom, a sliding carriage movable totherein, continuously-movingmeans for moving said carriage away from the shed, a springpressedplunger, means on the carriage for abutting against the plunger andcompressing the spring therefor so that the spring is in a compressedcondition when the plunger reaches the limit of its movement away fromthe shed, and means for causing the plunger to thrust the carriagetoward the shed.

4. In a loom, a sliding carriage movable to and from the fabric forfirst withdrawing a pile wire and then inserting it in the shed, meanson the carriage for engaging the wire when the carriage is positionedadjacent to the fabric, a drive chain for moving the carriage away fromthe fabric, a spring-pressed plunger for forcing the carriage and thepile wire engaged by it toward the fabric, a pawl on the carriage forengaging the drive chain so that said chain moves the carriage away fromthe fabric, means on the carriage for abutting against the plunger andcompressing the spring thereof while the carriage is moved away from thefabric by the drive chain, and means for disengaging the pawl from thedrive chain when the carriage reaches the limit of its movement awayfrom the fabric so that the plunger will then act to project thecarriage and the wire engaged thereby toward the fabric to cause saidwire to be inserted in the fabric shed.

5. In a loom, a frame member, a sliding carriage movable on said memberto and from the fabric for withdrawing a pile wire from the fabric andthen inserting it in the shed, means on the carriage for engaging thewire when the carriage is positioned adjacent to the fabric, acontinuously moving drive chain for moving the carriage away from thefabric, said drive chain having a projection for engaging the carriage,a spring-pressed plunger for forcing the carriage and the wire engagedthereby toward the fabric, a pawl on the carriage for engaging theprojection on the drive chain so that said chain moves the carriage awayfrom the fabric, means on the carriage for abutting against the plungerand compressing the. spring thereof while the carriage is moved awayfrom the fabric by the drive chain, and a fixed projection for causingthe pawl to be disengaged from the drive chain when the carriage reachesthe, limit of its movement away from the fabric so that the plunger willthen act to project the carriage and the wire engaged thereby toward thefabric to cause said wire to be inserted in the fabric shed.

RAYMOND SUTCLIFFE.

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